Motor-truck attachment.



J. W. SHAW.

MOTOR TRUCK ATTACHMENT.

APPLICATION FILED MAY 24, 1917.

Patented Nov. 12, 1918..

3 SHEETS-SHEET l.

J. W. SHAW.

MOTOR TRUCK ATTACHMENT.

APPLICATION FILED MAY 24, .l917- Patented Nov. 12, 1918,

3 SHEETS-SHEET 2.

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MOTOR TRUCK ATTACHMENT.

APPLICATION FILED MAY24,1917.

Patented Nov. 12, 1918.

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. 1916, and Which are adapted to convert an ordinary passenger carrying automobile into i a freight carrying truck. I

And the present improvement has for 1ts object to provide a simpleand efficient structural formation-and combination of parts,

- whereby lateral flexibility is imparted-to reorganized structure, and with which a conven ient and ready assemblage of the parts can be efl'ectedfall as will hereinafter more 'fully'appear. H

In the accompanying drawings: r Figure 1, is a perspective view illustrating the general arrangement of parts in the present improvement. I

Fig. 2, is'a side elevation of the same. f F ig., 3,*- is a top view of the truck frame and accessories. 1

Fig. 4, is an enlarged detall top view-with parts removed and in section, of the. uni-.

versal connection of the vibratory frame of the present improvement. I

Fig-5, is an enlarged detail rear elevation partly in section of the structureshown 1n Y with parts in section of a modification.

Fig. 6,. isan' enlarged detail rear elevation .Similar reference numerals indicate like parts in the 1 several news.

- f In the drawings, designates the usual supporting frame or chassis of'a passenger carrying automobile, upon which is mounted and other usual accessorles, the main. or

, ,of a freightcarrying truck body of any ordi-- the forward portion of a vehicle body, motor powershaft'2 of the motor having the usual central longitudinal arrangement.

3, 'designatesan auxiliary frame, con'sti-'" tuting a rearwardextension of the frame or chasis 1 aforesaid, and fixedly secured thereto by rivets orother usual connecting means to constitute the support for the rear portion nary form. v

4 designates a vibratory frame located be- Specification of Letters Patent.

=said.

Patented Nov. 112, 19115.,

Application filed may 24,1917. Serial No. 170,714.

neath the frames 1, 2, aforesaid, and which in i the present improvement is pivotally attached at its forward end to a transverse rail or member 5 of the auxiliary frame 3 aforesaid, by a centrally arranged universal joint 6, preferably of the sphericaltype shown, and which in the preferred construction shown inFigs. 1 to 5, inclusive, comprises as follows:

7 designates a semi-spherical central formation of the transverse rail 5 aforesaid, and which inconnection with a removable cap member 8, of a corresponding semi-spherical formation, constitutes-the outer and fixed member of theuniversal joint 6 aforesaid.

9 designates a spherical head constituting the inner and movable member of the universal joint 6 aforesaid. In the present 'improvement the head 9 is formed,with a diametric; opening or passage 10, adapted to receive an adjacent part of the longitudinal drive or motor shaft 11 and inclosing casing 12 thereof, of the'vehicle. Said head 9 is also provided with rear extensions'13 of a horizontally expanded or inclined shape,

for the rigid attachment of the inclined forward'ends of the vibratory frame 4] afore- To effect a ready and'convenient assemblage of the parts of the universal joint 6, around the longitudinal drive shaft 11 and its inclosing housin 12, the inner arid movable head 9 of said oint is, in the pre-- ferred construction shown in Figs. 4 and 5, made in two halves or parts, with a corresponding separation of the frame attaching extension 13, andfthe -said halves'or parts are preferably held from independent 'longitu 'dinal' movement in relation to each other by inter-engaging lugs and recesses 9 at the meeting edges of the parts as shown in Fig. 4..

With such formation, and withthe afore- I sald cap member 8 removed, the respective parts of the spherical head 9 can be introduced sidewise into place, around the longitudinal drive shaft 11 and housing 12, and securely held inproper position by a subsequelnt application of the cap member 8 aforesai ile the preferred form of the present invention as illustrated in Figs. 1, 4 and 5,

involves the formation of the spherical head i 9 in two separable halves as heretofore de- J scribed, it is within the scope of the present invention to make said spherical head in one piece as illustrated in Fig. 6, and in such modified structure the spherical head 9' will have an open bot-tom longitudinal vpassage 10' adapted for downward application over the longitudinal drive shaft 11, and its inclosing housing 12, as illustrated in Fig. 6.

At its rear endthe vibratory frame t aforesaid, is connected to the driving axle of the reconstructed vehicle, and preferably in the manner set forth in my former application, as follows: I

14 designates the rear driving wheels mounted on the usual non-revoluble axle 15, which in turn is resiliently connected to a rear portion of the auxiliary frame 3 by springs 16 and other usual connecting means.

17 designates a transVersely arranged driving shaft, of the ordinary difi'erential type, and having operative connection at its middle with the power shaft 2 aforesaid, While its respective ends are provided with sprocket pinions 18, which in turn have chain connections. 19 with sprocket wheels 20 fixedly associated with the rear driving wheels 14 aforesaid. As in my former construction a material part of the present invention comprises the mounting of the said intermediate difierential driving shaft 17 in journal boxes 21 fixed to the vibratory frame 4 aforesaid, so as to maintain a fixed relation between the shaft 17 and driving wheels 14 and thus prevent the chains 19 be' coming detached from the sprocket pinions and gears in actual use. 7

Having thus fully described my said invention, what I claim as new and desire to centrally disposed universal joint, comprissprocket wheel connections with the driving wheels aforesaid, and operative connec- I nected to the forward end of the aforesaidvibratory frame, said inner member being formed in halves and provided with a longitudinal passage for the longitudinal drive shaft of the vehicle, the rear end of said vibratory framebeing attached to the axle W d, and a differential drive shaft mounted on said vibratory frame and'having chain and sprocket wheelconnections with the driving wheels aforesaid, and oper- I 'ative connection with the longitudinal drive shaft of the vehicle, substantially as set forth.

3. In a motor truck attachment of the type herein described, the combination of a main frame, an axle resiliently associated with said main frame, driving wheels mounted on said axle, a vibratory frame pivotally connected at its forward end to a fixed transverse portion of the main frame a single centrally disposed universal omt, comprising a fixed outer sectional" ing a fixed outer sectional member and a,-

movable inner member connected to the'forward end of the aforesaid vibratory frame and provided with a longitudinal passage 'for the longitudinal drive shaft of .the vef hicle, the rear end of saidvibratory frame being attached to the axle aforesaid, and a differential drive shaft mounted on said vibratory. frame and having chain and member and a-movable inner member connected to the forward end of the aforesaid vibratory frame, said inner member being formed in halves and provided with a longitudinal passage for the longitudinal drive shaft of the vehicle and with inter-engaging lugs and recesses at the meeting edges of said halves, the rear end of said vibratory frame being attached to the axle afore said, and a difierential drive shaft. mounted on said vibratory frame and having chain and sprocket wheel connections with the driving wheels aforesaid, and operative connection with the longitudinal drive shaft of the vehicle, substantially as set forth.

Signed at Chicago, of May, 1917. 1

ts w. SHAW,

Illinois, this 22nd day\ 

